56501571 has 16 divisors (see below), whose sum is σ = 86265344. Its totient is φ = 32223744.

The previous prime is 56501537. The next prime is 56501581. The reversal of 56501571 is 17510565.

56501571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56501571 - 2⁷ = 56501443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56501581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9786 + ... + 14448.

It is an arithmetic number, because the mean of its divisors is an integer number (5391584).

Almost surely, 2^56501571 is an apocalyptic number.

56501571 is a deficient number, since it is larger than the sum of its proper divisors (29763773).

56501571 is a wasteful number, since it uses less digits than its factorization.

56501571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 56501571 is about 7516.7526898256. The cubic root of 56501571 is about 383.7250704061.

The spelling of 56501571 in words is "fifty-six million, five hundred one thousand, five hundred seventy-one".